Trott failed twice when up against more than a pop gun attack. Unfortunately Lyth didn't take his chance either. Cook looked more convincing in defence especially with his footwork and judgement about where his off stump was. Wasn't able to score freely against an attack containing decent bowlers though.
Cook really is vital to England, when he scores runs we tend to do well. Hopefully the knowledge that he's not going to saved by simply being England's golden boy might get the best out of him. I have a feeling that he won't be captain this time next year.